Over the years the number of needs emerging for hooking into the API call lifecycle has increased. There are many parallel efforts that could use some unified vision to ensure we come to the most flexible yet performant solution we can.
We've had async_hooks for a while now, providing an identifying hook into the async stack graph. There was also discussion about a generic diagnostics channel for APIs to communicate diagnostic data to any interested consumers such as APMs. More recently, we've seen efforts around policy enforcement, es module loader hooks, input validation or modification, and mocking.
I would like to discuss what the numerous needs are for a hook system in Node.js, where needs intersect, and chart a path forward to implement something that can satisfy those needs as effectively and as efficiently as possible.
